* Dorothy B. Hughes, 88, a mystery writer as well as a critic and historian of mystery fiction, died of complications from a stroke Thursday at her home in Ashland, Ore. She wrote 14 mystery novels, most of them set in the Southwest and involving an upper-class hero caught up in evil intrigue. Her best-known works include "The Cross-Eyed Bear" (1940), "Ride the Pink Horse" (1946), "The Expendable Man" (1964) and "In a Lonely Place" (1947), which was made into a movie starring Humphrey Bogart. In 1979 she won an Edgar Award from the Mystery Writers of America, of which she was a founding member, for her critical biography "Erle Stanley Gardner: The Case of the Real Perry Mason" (1978).
* Donald Kvares, 57, the author of more than 100 plays, many of which were performed Off and Off-Off Broadway, died Tuesday of complications from diabetes at the Veterans' Administration Hospital in the Bronx, N.Y. The satirical tone of his work was often captured in titles like "Wuziz," "Couchmates," "Springtime for Mahler" and "Freudian Memoirs of Viola Pickins."
* Retired Bishop George W. Ahr, 89, who headed the Roman Catholic Church's Trenton, N.J., diocese for 30 years and presided over its expansion, died Wednesday. He founded 50 parishes and dedicated 100 new churches before retiring in 1980.
* Thorkild Jacobsen, 88, a retired Harvard professor of ancient Middle Eastern languages, died May 2 in Cambridge, Mass. Mr. Jacobsen, who worked on an archaeological excavation of ancient Mesopotamia, now Iraq, in 1930, dedicated his life to learning about the poetry and religion of Mesopotamia by deciphering cuneiforms, clay tablets on which the 3,000-year-old language was written.
* Wai Yak Chin, 71, the sole survivor of the Wah Mee massacre of 1983, in which 13 people were shot to death at a Chinatown gambling club, died May 3 after a long illness in Seattle. Mr. Chin was a dealer at the Wah Mee gambling club on Feb. 19, 1983, when three young men entered and announced a holdup. The intruders tied up 13 employees and patrons and shot them to death. Three men were convicted of murder. Mr. Chin, shot in the neck and jaw, testified at their trial.
* Kenneth R. Giddens, 84, a longtime broadcaster and former director of Voice of America, died Friday in Mobile, Ala. From 1969 to 1977, he was director of the Voice of America and assistant director of the United States Information Agency. In 1985, he served as acting director of Radio Marti, a branch of the USIA and Voice of America.
* Vincent Klock, 76, a former Detroit Free Press news editor responsible for some of the newspaper's most memorable front pages, died Thursday of kidney failure.